07/18/2026
The human botfly does not chase you. It outsources the delivery to a mosquito, turning an ordinary bite into biological smuggling.
The part that follows makes the mosquito seem almost innocent.
A female botfly captures a blood-feeding insect in midair, often a mosquito, and glues her eggs to its abdomen. She then releases the unwilling courier to continue hunting as usual.
When the mosquito lands on warm skin, body heat triggers the eggs to hatch. The tiny larvae can enter through the fresh bite, a hair follicle, or another small opening before settling beneath the surface.
Each larva creates its own pocket inside the skin and leaves a narrow breathing hole exposed. For the next five to ten weeks, it feeds on fluids, proteins, and cellular debris produced by the irritated tissue around it.
The swelling may itch, leak, sting, or feel as though something is moving inside. Occasionally, part of the larva can even be seen rising toward the opening for air.
Once fully grown, it crawls out, drops to the ground, and continues transforming into an adult fly.
The mosquito thought it was taking a meal. It was actually delivering one.